IHydroxypropyl methylcellulose isetshenziswa njenge-substrate yezinto ezingavuthiwe ukukhiqiza uwoyela, okwazi ukubona ukusetshenziswa kukashukela usuwonke, uthuthukise izinga lokusetshenziswa kwezinto ezingavuthiwe, unciphise inani elisele le-substrate kumhluzi wokuvutshelwa, futhi wehlise izindleko zokuhlanza amanzi angcolile. Le hydroxypropyl methylcellulose Isici esiyinhloko sihambisana nokwenza kahle kweqoqo, inqwaba ephakelwayo kanye nezinqubo zokuvutshelwa okuqhubekayo, ukugwema uchungechunge lwezinkinga ezifana nokulawulwa kokwakheka okuphakathi nendawo kanye nezinga lokuhlanjululwa; kuyasiza futhi ekulawuleni inqubo yokuvutshelwa.
IHydroxypropyl methylcellulose, i-cellulose yempahla eluhlaza, ingaba ukotini ocolisisiwe noma ukhuni. Kudingeka kakhulu ukuyichoboza ngaphambi kwe-alkalization noma ngesikhathi se-alkalization. Ukuchotshozwa ukucekela phansi i-cellulose impahla eluhlaza ngamandla emishini. Isakhiwo sesimo sokuhlanganisa se-cellulose macromolecules singanciphisa izinga lecrystallinity kanye ne-polymerization, sandise indawo yayo, ngaleyo ndlela sithuthukise ukufinyeleleka kanye nekhono lokusabela kwamakhemikhali le-reagent yokusabela emaqenjini amathathu e-hydroxyl eqenjini lendandatho ye-glucose ye-cellulose macromolecule.
Nakuba isimiso sokuhlanganisa se-etherification ye-hydroxypropyl methylcellulose singeyona inkimbinkimbi, izindawo ezihlukahlukene ze-alkalization, ukuchotshozwa kwempahla eluhlaza, i-etherification, ukubuyiswa kwe-solvent, ukuhlukaniswa kwe-centrifugal, ukugeza nokomisa kuhilela inombolo enkulu yobuchwepheshe obuyinhloko nolwazi olucebile. Ezinhlotsheni ezahlukene zemikhiqizo, indawo ngayinye inezimo zokulawula zakamuva, ezifana nezinga lokushisa, isikhathi, ingcindezi nokulawula ukugeleza kwezinto. Amathuluzi asizayo namathuluzi okulawula ayiziqinisekiso ezivumayo zekhwalithi yomkhiqizo ezinzile kanye nezinhlelo zokukhiqiza ezinokwethenjelwa.
Njengoba ukusebenza kwe-hydroxypropyl methylcellulose kufana namanye ama-ethers ancibilikayo emanzini, ingasetshenziswa njenge-ejenti eyenza ifilimu, i-thickener, emulsifier kanye ne-stabilizer kupende we-latex kanye nezingxenye zopende ze-resin ezincibilika emanzini.
Yenza ifilimu enamathelayo ibe nokungagugi okuhle, izinga kanye nokunamathela, futhi uthuthukise ukungezwani kwendawo, ukuzinza ku-asidi ne-alkali, nokuhambisana nombala wensimbi. IHydroxypropyl methylcellulose inomphumela omuhle njengokujiya kupende omhlophe we-polyvinyl acetate osuselwe emanzini. Izinga lokushintshwa kwe-cellulose ether liyakhula, futhi ukumelana nokuguguleka kwebhaktheriya nakho kuyathuthukiswa.
Isikhathi sokuthumela: Feb-17-2023